<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>css3+js打造漂亮时钟</title>
<style>
body{background: -webkit-radial-gradient(center center,circle,#666,#000); margin: 0;}
div{margin: 0; padding: 0;}
.box{padding-top: 50px; width:410px; margin: 0 auto;}
.clock{position: relative; width:400px; height: 400px; border: 5px solid #fff; border-radius: 200px; background:-webkit-radial-gradient(center center,circle,#fff,#bbb); box-shadow: 1px 1px 30px rgba(0, 0, 0, 0.8); }
.clock .clock-xin{position: absolute; top: 50%; left: 50%; width:30px; height: 30px; border-radius: 15px; background: #eee;margin:-15px 0 0 -15px;}
.clock .clock-xin2{position: absolute; top: 50%; left: 50%; width:12px; height: 12px; border-radius: 6px; background: #f00; z-index: 100; margin:-6px 0 0 -6px;}
.clock .date{position: absolute; z-index: 3; top: 245px; left: 130px; font-size: 20px; color: #000; text-shadow: 1px 1px white; }
.clock .hour{position: absolute; z-index: 3; top: 50%; left: 50%; width:160px; height: 6px; border-radius:5px; background: #000; -webkit-transform-origin: 10px 50%; margin:-3px 0 0 -10px;}
.clock .min{position: absolute; z-index: 4;top: 50%; left: 50%; width:180px; height: 4px; border-radius:5px; background: #333; -webkit-transform-origin: 10px 50%; margin:-2px 0 0 -10px;}
.clock .sec{position: absolute; z-index: 5; top: 50%; left: 50%; width:210px; height: 2px; background: #f00; -webkit-transform-origin: 30px 50%; margin:-1px 0 0 -30px;}
.clock em{display: block; width: 2px; height: 5px; background: #000; position: absolute; top: 0; left: 0; -webkit-transform-origin: 50% 0; margin-left: -1px;}
.clock em.ishour{width: 6px; height: 10px; margin-left: -3px;}
.clock em.ishour i{font-size: 25px; color: #000; position: absolute; top: 12px; left: -7px;text-shadow: 1px 1px white; }
</style>
</head>
<body>

<div class="box">
    <div class="clock" id="clock">
        <div class="clock-xin"></div>
        <div class="clock-xin2"></div>
        <div id="date" class="date"></div>
        <div id="hour" class="hour"></div>
        <div id="min" class="min"></div>
        <div id="sec" class="sec"></div>
    </div>
</div>

<script>
window.onload = function() {
    var winHeight = document.documentElement.clientHeight;
    document.getElementsByTagName('body')[0].style.height = winHeight+'px';

    var $clock = document.getElementById('clock'),
        $date = document.getElementById('date'),
        $hour = document.getElementById('hour'),
        $min = document.getElementById('min'),
        $sec = document.getElementById('sec'),
        oSecs = document.createElement('em');
    for (var i = 1; i < 61; i++) {
        var tempSecs = oSecs.cloneNode(),
        pos = getSecPos(i);
        if(i%5==0){
            tempSecs.className = 'ishour';
            tempSecs.innerHTML = '<i style="-webkit-transform:rotate('+(-i*6)+'deg);">'+(i/5)+'</i>';
        }
        tempSecs.style.cssText='left:'+pos.x+'px; top:'+pos.y+'px; -webkit-transform:rotate('+i*6+'deg);';
        $clock.appendChild(tempSecs);
    }

    // 圆弧上的坐标换算
    function getSecPos(dep) {
        var hudu = (2*Math.PI/360)*6*dep,
        r = 200; //半径大小
        return {
            x: Math.floor(r + Math.sin(hudu)*r),
            y: Math.floor(r - Math.cos(hudu)*r),
        }
    }


    ;(function() {
        // 当前时间
        var _now = new Date(),
        _h = _now.getHours(),
        _m = _now.getMinutes(),
        _s = _now.getSeconds();

        var _day = _now.getDay();
        _day = (_day==0)?7:_day;
        $date.innerHTML = _now.getFullYear()+'-'+(_now.getMonth()+1)+'-'+_now.getDate()+' 星期'+_day;
        //绘制时钟
        var gotime = function(){
            var _h_dep = 0;
            _s++;
            if(_s>59){
                _s=0;
                _m++;
            }
            if(_m>59){
                _m=0;
                _h++;
            }
            if(_h>12){
               _h = _h-12;
            }

            //时针偏移距离
            _h_dep = Math.floor(_m/12)*6; 

            $hour.style.cssText = '-webkit-transform:rotate('+(_h*30-90+_h_dep)+'deg);';
            $min.style.cssText = '-webkit-transform:rotate('+(_m*6-90)+'deg);';
            $sec.style.cssText = '-webkit-transform:rotate('+(_s*6-90)+'deg);';

        };

        gotime();
        setInterval(gotime, 1000);
    })();

};


</script>
</body>
</html>